Updates on Analysis Trigger commissioning after EYETS 24

Updates on Analysis Trigger commissioning after EYETS 24. 05. 2017 Benedikt Würkner

Analysis • MC study “tool” • • • Comparing different cuts for chi 2, max. Doca, … Introduced doca. Cut Compare MC Tracks with Rec Tracks • • Varying plots and parameters to see influence Trying to understand where the differences come from 24. 05. 2017 Benedikt Würkner

Position calculation improvements • • Iteratively reduce the cut around the previous fit where tracks are accepted for the fit Increases the position calculation accuracy (for x=1, y=1 MC file) • • • Offset x/y: 0. 633236 / 0. 68503 with a cut of: 2. 5, remaining entries: 92. 32% Offset x/y: 0. 751558 / 0. 795379 with a cut of: 2. 27273, remaining entries: 90. 51% Offset x/y: 0. 786129 / 0. 824067 with a cut of: 2. 06612, remaining entries: 89. 01% Offset x/y: 0. 807578 / 0. 841333 with a cut of: 1. 87829, remaining entries: 87. 32% Offset x/y: 0. 824198 / 0. 857053 with a cut of: 1. 70753, remaining entries: 85. 56% Offset x/y: 0. 839924 / 0. 872818 with a cut of: 1. 5523, remaining entries: 83. 60% Offset x/y: 0. 854079 / 0. 885417 with a cut of: 1. 41118, remaining entries: 81. 59% Offset x/y: 0. 868106 / 0. 89618 with a cut of: 1. 2829, remaining entries: 79. 45% Offset x/y: 0. 882191 / 0. 908795 with a cut of: 1. 16627, remaining entries: 77. 06% Offset x/y: 0. 892698 / 0. 918693 with a cut of: 1. 06024, remaining entries: 74. 71% Offset x/y: 0. 903333 / 0. 927654 with a cut of: 0. 963858, remaining entries: 72. 29% Offset x/y: 0. 912562 / 0. 934192 with a cut of: 0. 876235, remaining entries: 69. 87% 24. 05. 2017 Benedikt Würkner

Position calculation improvements 24. 05. 2017 Benedikt Würkner

Estimated beam size based on cutoff • • • 24. 05. 2017 Applying a changing offset on the d. Cut to monitor how it influences the estimated beam size Spikes in 150 um plot are visible, the rest is very straight forward Estimation generally underestimates the beam size Benedikt Würkner

MC Tracks vs Rec Tracks 24. 05. 2017 Benedikt Würkner

MC Tracks vs Rec Tracks 24. 05. 2017 Benedikt Würkner

MC Tracks vs Rec Tracks 24. 05. 2017 Benedikt Würkner

MC Tracks vs Rec Tracks sqrt(0. 041)=0. 202 mm 24. 05. 2017 sqrt(0. 0185)=0. 136 mm Benedikt Würkner

Problematic reconstructed tracks Reconstructed Tracks MC Tracks 24. 05. 2017 Benedikt Würkner

More than 2 tracks 24. 05. 2017 Benedikt Würkner

Trigger Commissioning • • • Trigger threshold scan after 20 d. B (1/100) attenuator was installed Trigger threshold scan after 10 d. B (1/10) attenuator was installed Trigger threshold scan with first stable beam Picoscope scan with [1750: 2150] Volts Elogbook entry 24. 05. 2017 Benedikt Würkner

Trigger scan 20 d. B vs 10 d. B With Beam 20 d. B 24. 05. 2017 Without beam 10 d. B Benedikt Würkner

Trigger scan 1750 V 24. 05. 2017 Benedikt Würkner

Trigger scan 2150 V 24. 05. 2017 Benedikt Würkner

Picoscope triggering on channel C 1750 V 1850 V 24. 05. 2017 Benedikt Würkner

Picoscope triggering on channel C 1950 V 2050 V 24. 05. 2017 2150 V Benedikt Würkner

1850 V 2150 V 24. 05. 2017 Benedikt Würkner

Comparing trigger settings 1100 = Only Signal Plane and no Veto (ignoring Confirm) 1000 = Signal and Confirm coincidence (and no Veto) 24. 05. 2017 Benedikt Würkner

Summary • Analysis is moving slowly • • good parameters are hard to come by Still not sure about the quality of some track fit parts Problem with wrongly fitted tracks persists and leads to more influence than expected Trigger • • Looks promising, 10 d. B attenuator appears to be the correct limit Too low voltage (as was used last year) appears to negatively influence the trigger Increase in voltage increases rate as expected More comparisons to last years trigger setup still missing 24. 05. 2017 Benedikt Würkner